Project GRUDGE Report
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Publication date
1951
Usage
Public Domain Mark 1.0
Topics
Air Force, US Air Force, UFO, UFOs
Collectionnationalsecurityarchive; additional_collections
LanguageEnglish
Project Grudge was a short-lived project by the U.S. Air Force to investigate unidentified flying objects (UFOs). Grudge succeeded Project Sign in February, 1949, and was then followed by Project Blue Book. The project formally ended in December 1949, but continued in a minimal capacity until late 1951.
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